Let

with and . In other words, let and . Let . It can be shown that .

Prove that for , and for , , that

.

I'm really stuck on this one. Any help would be much appreciated. Thanks!

(By the way, this is from Fritz John,Partial Differential Equations, exercise 2.4.7b., p46.)

EDIT: Thanks for the help! It is now solved, with the following proof:

Originally Posted byme